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What one dose does
PARAMETER
1 g / 100 L
Silicate
+2.114 ppm SiO₂
Alkalinity
+0.1973 dKH
To raise silicate by 0.2 ppm SiO₂ in 100 L: 0.095 g.
How it’s used
Reagent/technical grade; crystals effloresce/lose water over time - verify with a test.
Cautions
• Natural surface seawater silicate is low and variable; most reefs run <~1 ppm SiO2. Dose only deliberately (sponges, diatom-vs-dino strategies), small daily amounts - a large single addition is likely to trigger a diatom bloom.
• Kits report SiO2 or Si (SiO2 = Si x 2.139); confirm the unit before calculating.
• Metasilicate is caustic (pH ~12-13 in solution); gloves and eye protection.
• Silica is depleted quickly (RHF observed ~50%/day) - test before each adjustment.